1. The price reported in Column 4 is a weighted average price. These shares were purchased in mulitple transactions at prices ranging from $66.66 to $67.64. The reporting person undertakes to provide to DaVita HealthCare Partners Inc. ("DaVita HCP"), any security holder of DaVita HCP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnotes 1-6 to this Form 4.

2. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $67.66 to $68.00.

3. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $66.12 to $67.11.

4. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $67.12 to $67.46.

5. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $66.73 to $67.72.

6. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $67.73 to $68.00.

7. 18,513,482 of the total reported securities are owned by the following subsidiaries of Berkshire Hathaway Inc. ("Berkshire"): Government Employees Insurance Company (11,208,904), GEICO Indemnity Company (6,795,084), GEICO Advantage Insurance Company (223,398), GEICO Choice Insurance Company (222,842) and GEICO Secure Insurance Company (63,254). As Berkshire is in the chain of ownership of these subsidiaries, it may be deemed presently to both beneficially own and have a pecuniary interest in all shares of Common Stock presently owned by each subsidiary. Warren E. Buffett, as the controlling stockholder of Berkshire, may be deemed presently to beneficially own, but only to the extent he has a pecuniary interest in, the shares of Common Stock presently owned by each such subsidiary. Mr. Buffett disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein.